How to reverse the middle words of a string in Rust

1 Answer

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fn reverse_middle_words(input: &str) -> String {
    let words: Vec<&str> = input.split_whitespace().collect();
    let len = words.len();

    // If there are 2 or fewer words, there are no "middle" words to reverse
    if len <= 2 {
        return input.to_string();
    }

    let mut result = Vec::new();

    for (i, word) in words.iter().enumerate() {
        if i == 0 || i == len - 1 {
            // Keep the first and last words as they are
            result.push(word.to_string());
        } else {
            // Reverse the characters of the middle words
            let reversed_word: String = word.chars().rev().collect();
            result.push(reversed_word);
        }
    }

    result.join(" ")
}

fn main() {
    let input = "Hello how are you today";
    
    let modified = reverse_middle_words(input);

    println!("{}", modified);
}




/*
run:

Hello woh era uoy today

*/

 



answered Dec 25, 2025 by avibootz
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